Free tools / Startup Runway Calculator
Work out how long your runway lasts
Months of runway left and the date you hit zero, from your cash and monthly burn.
The full read
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Cash on hand, monthly burn, and how long until zero.
Runway is the number every founder should know cold: how many months of cash you have left at your current burn. Enter two numbers to find out.
Runway = cash on hand divided by monthly net burn (what you spend minus what you bring in).
If you're profitable, bringing in more than you spend, your runway is effectively infinite, and this calculator will tell you so.
A common rule of thumb: start raising or cutting when you hit roughly six months of runway, because closing a round or finding profitability almost always takes longer than you expect.
Want proof it’s not made up? See real ideas run through this tool: the buyer, the spots, and the opener actually sent.
Questions
3 answeredHow do I calculate startup runway?
Divide your cash on hand by your monthly net burn (what you spend minus what you bring in). That's how many months you have left. Enter both numbers above for your runway and zero-cash date.
What is a good amount of runway?
Most founders aim to keep at least six months of runway. Start raising or cutting costs when you hit it, because closing a round or reaching profitability almost always takes longer than expected.
What is burn rate?
Burn rate is how much cash you lose each month: spending minus revenue. If you bring in more than you spend, your burn is negative and your runway is effectively infinite.
The guide behind this tool
How to calculate your startup runway
Calculate your startup runway by dividing cash on hand by net monthly burn: that's the months you have until zero. Here's the formula and how to extend it.
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